feat(loyalty): remove paying with EnakPoint

EnakPoint can only be redeemed for vouchers now: it can no longer pay for
orders and is never cashed out (docs/enakgame-prd.md §3.2, EG-001,
EG-002). No order was ever paid with EnakPoint, so there is no data to
move.

Removed:
- POST /customer/wallet/payment-code, POST /customer/orders/:id/pay-with-points
  and GET /orders/:id/point-payment/preview, with their processors,
  repositories, services, handlers and tests.
- The point payment method type: paying, splitting and refunding with it,
  the outlet filter on the method list, and the system-method guard.
- points and payment_code on CreatePayment; points_used and point_value
  on payments; accepts_point_payment on the customer outlets.
- The outlet point_payment settings. A PUT that still sends them is
  rejected as an unknown field.
- The EnakPoint split in the payment method analytics.
- PAYMENT and PAYMENT_REFUND from the wallet type rules. Tests that used
  them as a generic EnakPoint debit use REWARD_REDEEM.
- The EnakPoint-paid part from the earning basis, which is
  subtotal − discount again.

Migration 000102 drops the trigger, the point methods and their index,
the payments columns, and the outlet settings, and restores the method
type CHECK without point. payments.payment_method_id is ON DELETE
RESTRICT, so it fails rather than lose a payment made with EnakPoint.

The integration docs list the removed endpoints and fields, and the
EnakPoint & EnakCoin PRD and tasks note what is superseded.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/repository/earning_repository.go

@@ -44,9 +44,6 @@ type EarningCursor struct {
 // EarningRepository reads orders for loyalty earning (docs/prd-point-coin.md F3).
 type EarningRepository interface {
 	GetOrderForEarning(ctx context.Context, orderID uuid.UUID) (*EarningOrder, error)
-	// PointPaidAmount is the rupiah part of the order paid with EnakPoint, which earns
-	// nothing (Q10). Zero until EnakPoint payment exists (phase 3).
-	PointPaidAmount(ctx context.Context, orderID uuid.UUID) (float64, error)
 	// ListPaidOrdersWithoutEarning pages, oldest first, through orders updated since
 	// the given time that are paid, not void, have an eligible customer, belong to an
 	// outlet that earns something, and have no EARN row yet. Pass the previous page's
@@ -92,13 +89,7 @@ func (r *earningRepository) GetOrderForEarning(ctx context.Context, orderID uuid
 		SELECT o.id::text AS id, o.organization_id::text AS organization_id, o.outlet_id::text AS outlet_id,
 			o.order_number, COALESCE(ou.name, '') AS outlet_name, o.customer_id::text AS customer_id,
 			o.subtotal, COALESCE(o.discount_amount, 0) AS discount_amount, o.payment_status,
-			COALESCE(o.is_void, false) AS is_void,
-			-- Refunds of EnakPoint payments are left out: that part never earned (Q10),
-			-- so giving it back must not take earning back.
-			COALESCE(o.refund_amount, 0) - COALESCE((
-				SELECT SUM(COALESCE(p.refund_amount, 0)) FROM payments p
-				JOIN payment_methods pm ON pm.id = p.payment_method_id
-				WHERE p.order_id = o.id AND pm.type = 'point'), 0) AS refund_amount,
+			COALESCE(o.is_void, false) AS is_void, COALESCE(o.refund_amount, 0) AS refund_amount,
 			c.is_default AS customer_is_default, c.is_active AS customer_is_active
 		FROM orders o
 		LEFT JOIN outlets ou ON ou.id = o.outlet_id
@@ -134,21 +125,6 @@ func (r *earningRepository) GetOrderForEarning(ctx context.Context, orderID uuid
 	return order, nil
 }
 
-func (r *earningRepository) PointPaidAmount(ctx context.Context, orderID uuid.UUID) (float64, error) {
-	var total float64
-	err := DBFromContext(ctx, r.db).WithContext(ctx).Raw(`
-		SELECT COALESCE(SUM(p.amount), 0)
-		FROM payments p
-		JOIN payment_methods pm ON pm.id = p.payment_method_id
-		WHERE p.order_id = ? AND pm.type = ? AND p.status = ?`,
-		orderID, constants.PaymentMethodTypePoint, entities.PaymentTransactionStatusCompleted).
-		Scan(&total).Error
-	if err != nil {
-		return 0, fmt.Errorf("failed to sum EnakPoint payments: %w", err)
-	}
-	return total, nil
-}
-
 func (r *earningRepository) ListPaidOrdersWithoutEarning(ctx context.Context, since time.Time, after *EarningCursor, limit int) ([]EarningCursor, error) {
 	cursorAt, cursorID := since, uuid.Nil
 	if after != nil {